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    <meta name="description" content="Draw a polygon or extruded polygon on the globe surface.">
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    <title>Cesium Demo</title>
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    @import url(../templates/bucket.css);
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<script id="cesium_sandcastle_script">
function startup(Cesium) {
    'use strict';
//Sandcastle_Begin
// Create the viewer.
var viewer = new Cesium.Viewer('cesiumContainer');
var scene = viewer.scene;

// Example 1: Draw a red polygon on the globe surface.

// Create the polygon geometry. The positions here are
// in counter clockwise order.
var positions = Cesium.Cartesian3.fromDegreesArray([
    -115.0, 37.0,
    -115.0, 32.0,
    -107.0, 33.0,
    -102.0, 31.0,
    -102.0, 35.0
]);
// Create a geometry instance using the polygon geometry.
var redPolygonInstance = new Cesium.GeometryInstance({
    geometry : Cesium.PolygonGeometry.fromPositions({
        positions : positions,
        vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
    }),
    attributes: {
        color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.RED)
    }
});

// Example 2: Draw a blue polygon with holes.

// To draw a polygon with holes, create a nested position
// hierarchy defining the positions of the polygon
// edges and the positions of the holes.
var polygonHierarchy = {
    positions : Cesium.Cartesian3.fromDegreesArray([
        -99.0, 30.0,
        -85.0, 30.0,
        -85.0, 40.0,
        -99.0, 40.0
    ]),
    holes : [{
        positions : Cesium.Cartesian3.fromDegreesArray([
            -97.0, 31.0,
            -97.0, 39.0,
            -87.0, 39.0,
            -87.0, 31.0
        ]),
        holes : [{
            positions : Cesium.Cartesian3.fromDegreesArray([
                -95.0, 33.0,
                -89.0, 33.0,
                -89.0, 37.0,
                -95.0, 37.0
            ]),
            holes : [{
                positions : Cesium.Cartesian3.fromDegreesArray([
                    -93.0, 34.0,
                    -91.0, 34.0,
                    -91.0, 36.0,
                    -93.0, 36.0
                ])
            }]
        }]
    }]
};
// Create a geometry instance using the polygon geometry.
var bluePolygonInstance = new Cesium.GeometryInstance({
    geometry : new Cesium.PolygonGeometry({
        polygonHierarchy : polygonHierarchy,
        vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
    }),
    attributes: {
        color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.BLUE)
    }
});

// Example 3: Draw a green extruded polygon.

// To extrude, use the extruded height option to specify
// the height of the polygon geometry.
positions = Cesium.Cartesian3.fromDegreesArray([
    -108.0, 42.0,
    -100.0, 42.0,
    -104.0, 40.0
]);
var greenPolygonInstance = new Cesium.GeometryInstance({
    geometry : Cesium.PolygonGeometry.fromPositions({
        positions : positions,
        extrudedHeight: 500000.0,
        vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
    }),
    attributes: {
        color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.GREEN)
    }
});

// Example 4: Draw an orange extruded polygon with
// per position heights.

positions = Cesium.Cartesian3.fromDegreesArrayHeights([
    -108.0, 25.0, 100000,
    -100.0, 25.0, 100000,
    -100.0, 30.0, 100000,
    -108.0, 30.0, 300000
]);
// Set the perPositionHeight option to true for the polygon
// to use the heights each position.  In this case, we are
// also seting extrudedHeight to zero for the polygon
// to be extruded down to the globe surface.
var orangePolygonInstance = new Cesium.GeometryInstance({
    geometry : Cesium.PolygonGeometry.fromPositions({
        positions : positions,
        extrudedHeight: 0,
        vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
        perPositionHeight : true
    }),
    attributes: {
        color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.ORANGE)
    }
});

// Add each polygon instance to primitives.
scene.primitives.add(new Cesium.Primitive({
    geometryInstances : [redPolygonInstance, greenPolygonInstance, bluePolygonInstance, orangePolygonInstance],
    appearance : new Cesium.PerInstanceColorAppearance({
        closed : true,
        translucent : false
    })
}));
//Sandcastle_End
    Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
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